Indenting machine



July 8, 1941. I BOOTH 2,248,058

INDENTING MACHINE Fild June 5, 1939 2 Sheets-Sheet 1 Fig.1.

LINE OF FEED AME/V7175 July 8, 1941. 1, BOOTH 2,248,058

INDENTING MACHINE Filed June 5, 1959 2 Sheet-s Sheet 2 Patented July 8, 1941 Irving E. Booth, Rochester, N. Y., assignor to United Shoe Machinery Corporation, Borough of Flemington, N. J.

Jersey a corporation of New Application June 5, 1939, Serial No. 277,430 9 Claims. (CI. 12-32) This invention relates to finishing machines and more particularly to machines for making impressions or imitation stitches upon the upper surfaces of the projecting edges of shoe soles.

These upper surfaces are very resistant to presthe fact that sole edges, and particularly welted sole edges, vary in thickness in the course of their length. Thus, if a machine is set so that the indenting tool makes an acceptable impression in the thinner portions of an edge, the thicker portions of the edge will jam between the tool and the work support making it extremely diflicult to feed that section of the sole edge past the tool, while if the machine is set so that the tool makes acceptable impressions in the thicker portions of the sole edge then it will not make acceptable impressions in the thinner portions. To overcome the difficulty encountered in feeding a sole edge through a machine of this type, it has been proposed to assist the feed by driving the work table in the direction of the Work feed. This arrangement did not completely solve the problem because it was necessary to roughen the surface of the work table in order for it to obtain a sufficient grip on a sole to feed the thicker edge portions past the indenting tool, and when this was done the pressure from the indenting tool forced the tread surface of the sole into the roughened surface of the work support thereby marring that surface of the sole.

With the above in view, it is an object of this invention to provide a machine in which the work can be fed easily past the indenting tool .and without danger of marring the work. To this end, the illustrated machine is provided with a Work support and an indenting tool which is moved in a path that extends at an oblique angle to the plane of the feed so that when the tool strikes the work to indent the same it also pushes it forward in the direction of the feed.

These and other features of the invention will appear more fully from the following detailed description when read in connection with the accompanying drawings and will be pointed out in the appended claims.

In the drawings,

Fig. 1 is a front elevation of the head of a machine illustrating this invention;

Fig. 2 is a view similar to'Fig. 1 with the work support and face plate removed to show the construction and arrangement of the underlying parts;

Fig. 3 is an inclined sectional view through the head of the machine taken along lines 111-111 of Fig. 2 and showing, in addition to the structure shown in Fig. 2, part of the cover plate and the work support, and

Fig. 4 is a perspective View of the indenting wheel slide and showing the arrangement of the thrust bearings for that slide.

The illustrated machine comprises a rotatable work support I0 (Fig. 1) mounted on a carrier I! which is pivoted to the machine frame M by a pair of rearwardly extending arm l6, 18. The work support I0 is rotated in the direction of the feed and may be driven by any desired mechanism such, for example, as that disclosed in United States Letters Patent No. 1,869,476, granted August 2, 1932, upon an application of W. Hamann. Located above the work table is an indenting wheel which is rotatable on a headed pin 22 (Fig. 3) clamped in the forwardly extending lug 24 of a slide 26. The slide 26 (Fig. 4) has formed in its upper and lower ends recesses 28, 30 which receive guide rolls 32, 34. As is best shown in Fig. 2, the guide rolls 32, are offset to opposite sides of a vertical plane through the axis of the wheel 20 so that the slide 26 moves back and forth in a path oblique to the horizontal and downwardly and forwardly with respect to the line of feed of a shoe on the work support [0. Thus, when the slide 26 moves downwardly to press the indenting wheel 20 into the upper surface of the projecting edge portion of a shoe on the Work support II), it will cause the indenting wheel to strike this upper surface at an acute angle thereto and impart to it a blow which has both a horizontal and a vertical component. The vertical component of the blow forces the serrations on the indenting wheel into the upper surface of the work while the horizontal component gives the shoe a push in a forward direction, that is, in the direction of the feed, and thereby assists the feeding action of the driven work support Ill. The horizontal component of the blow is reduced somewhat due to the fact that the indenting Wheel 20 is rotatably mounted on the pin 22. However, there is still an appreciable force exerted due to the friction between the wheel 20 and the pin 22 resulting from the downward pressure ekented by the slide 26. The feeding effect of the indenting wheel 20 may be varied by changing the inclination of the path of movement of the slide 26 with respect to the line of the feed of the work. In the illustrated embodi- This setting I4 and a face plate 38, the lug 24 on the slide 26 1 extending through a slot 39 in the face plate 38. Q The guide rolls 32, 34 are located within this casing, the upper guide roll 32 being rotatably I mounted upon a pin 36 (Fig. 3) carried by the face plate 38, while {the lower guide roll 34 is l4. The movement of, the slide 26 is also controlled by guides located'adjacent to its upper and lower ends. The upper guide consists of a flange42onthe roll32 and a pair of rotatable thrust bearings 46 (Fig. 3). The flange 42 lies opposite a flat surface on thefront of the slide while the thrust bearings 45 are located behind the arms formed by the recess 28 and are mounted on bolts 41 which project inward from the side Walls of the frame l4, The lower guide consists of a flange 44 on the roll 34 and rotatable thrust bearings 48. The flange 44 engages the rear surface of the slide while the thrust bearings. en-

gage the front surface and aremounted on a transversely extending shaft 49 which is carried by a pair of spaced arms, 5| that. project forby the impact of the indenting wheel 20 on the work surface. 1

. The slide 26 is reciprocated by a toggle mechanism (Fig. 3) which consists of a pair of toggle links 50, 52. The link 56 is connected at its upper end ltO theframe l4 by a pin 54 and is connectedjat its lower end to the link 52 by a pivot pin 56-, the lower end of the link 52 inturn being connected to the slide 26 by a pin 58.; The links 50, 52 thus constitute a toggle which, when moved back and forth through its straightened position, reciprocates the slide '26 and moves the indenting wheel-20 into'and out of engagement with a shoe on the work support Ill. The toggle is thus operated by alink 60, one end of which is connected to the pivot pin 56, (Fig. 3) and the other end to a crank pin 62 on a shaft 64 (Fig. 2).. The shaft 64 drivenb-y a pulley 6b which is connected to a convenient source of power, such as a. motor (not shown), by-a. belt 68. The enclosed operating parts are lubricated by an endless chain 10 which surroundsthe shaft 64 (Figs. 2 and 3) and hangs down into an oil well 12 in the bottom of the casing (Fig. 3) formed by the headportion of themachine frame. l4 and the face plate 38.

.The indenting wheel 20 is provided with a guard 14 (Figs. 1 and 3) which is connected by a pivot pin 16 to-a bracket 18 mountedon the face plate 38.-- Mounted on :the guard 14 is an'ele-ctric heating unit 80 connected to a convenient source of power by leads 82; When the guard .14 is in its lowered position shown in. Fig. 3 it will be interposed between the indenting wheel 20 'andthe ment, the slide is shown as reciprocating in a v 3 path which is oflset about 20 from the vertical 1 or about 70 from the horizontal. 1 has been found to work well when operating upon 1 average materials; however, it may be varied one a way or the other in designing a machine so as to upper of a shoe being operated upon and the heat from the unit 80 will maintain the tool at a desired temperature.

While the operation of the machine will be understood from the foregoing description, it will be summarized briefly below. The work table I0 is first depressed in the usual manner and the projecting edge portion of a shoe is inserted beneath the indenting wheel 20 whereupon the tableis allowed to rise and carry the shoe up to the operating position where it will be operated upon as it is fed through the machine. During the operation the slide 26 is reciprocated rapidly by the toggle mechanism causing the indenting i rotatably mounted on a pin 40 which is supported by a rib4l that projects from the machine frame tool 20 to trike the upper surface of the projecting edge portion a series of rapid blows which indent that surface and, due to the angle at which they strike the upper surface, the blows also give.

the. edge portion a series of pushes or impulses which assist the driven work table in feeding it. through the machine.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent'of the United States is:

1. In an indenting machine, a work support, an indenting tool, and means for reciprocating the indenting tool toward and from the work support in a path extending at an oblique angle to the direction of the feed of a work piece on the 140 ward from the rib 4|. The roller thrust bearings i 46, 48 are arranged to resist the reaction caused support.

2. In an indenting machine, a work support, driving means arranged to rotate the work suppont in the direction of the feed, an indenting tool, and means for reciprocating the indenting tool toward .and from the work support in a path extending at an oblique angle to the direction of the feed.

3. In an indenting machine, a work support, a reciprocating tool carrier having an indenting tool mounted thereon, guiding means associated with the tool carrier and. arranged to position its movably mounted tool carrier having an indenting tool supported thereon, guiding means associated with said toolv carrier and arranged to guide its movements in" a path extending at an I oblique angle to the direction of the feed, a drive shaft, and a toggle mechanism operated by the drive shaftfor moving the tool carrier and the indenting tool toward and away from the work support.

5. In an indenting machine, a work support, means for rotating the work support in the direction of the feed, a reciprocating slide having an indenting tool mounted thereon, guiding means associated with said slide and arranged to guide its reciprocating movements in a path ex tending at an oblique angle to the plane of the feed, a drive shaft, and a toggle mechanism operated from the drive shaft for moving the slide and the indenting tool toward and away from the Work support.

6. In an indenting machine, a Work support, a reciprocating slide having an indenting tool mounted thereon, offset guides for said slide arranged to position its path of movement at an oblique angleto thehorizontal, means for moving the toggle in rapid succession thereby causing the indenting tool to beat against the work piece.

7. In an indenting machine, a work support, means for rotating the work support in the direction of the feed, a reciprocating slide having an indenting wheel mounted thereon, a pair of guide members for the reciprocating slide, said guide members being oifset in the direction of the feed thereby to guide the reciprocating slide in a path extending at an oblique angle to the plane of the feed, and means for operating the reciprocating slide, said means comprising a toggle and a driven crank for straightening the toggle to force the indenting wheel downwardly into the work to mark the same and also to assist the driven Work table in moving the work in the direction of the feed.

8. In an indenting machine, a work support,

an indenting tool mounted for movement relatively to the work support, a pivoted guard for the indenting wheel, and heating means for the indenting wheel mounted on the pivoted guard.

9. In an indenting machine, a work support, a slide arranged for movement relatively to the work support, said slide having a projecting portion, an indenting tool mounted on the projecting portion of the slide, guiding means associated with the slide and arranged to guide its movement in a path extending at an oblique angle to the direction of the feed, means for operating the slide to move the indenting tool into engagement with a work piece on the work support, and thrust bearings for the slide arranged to resist the reaction caused by the contact between the indenting tool and the work piece on the work support.

IRVING E. BOOTH. 

